Expressing obligation (pitää, kannattaa)

Expressing Obligation: The Genitive Subject

To express that someone must or should do something, Finnish uses a special sentence structure.

  1. The "doer" of the action (the subject) takes the genitive case (ending in -n).
  2. The obligation verb is always in the 3rd person singular, regardless of who is acting.
  3. The main action is in its dictionary form (the 1st infinitive).

Structure: Genitive Subject + 3rd Person Singular Verb + Infinitive

Personal pronouns in the genitive:

  • minäminun
  • sinäsinun
  • hänhänen
  • memeidän
  • teteidän
  • heheidän

The Verb "Pitää" (Must / Have to)

To say that someone must or has to do something, use the verb pitää.

You have to save money.
Sinun pitää säästää rahaa.
We must make a budget today.
Meidän pitää tehdä budjetti tänään.

This structure is common when discussing everyday tasks and personal finances:

You have to check the income and expenses today.
Sinun pitää tarkistaa tulot ja menot tänään.
He has to transfer the salary to the account.
Hänen pitää siirtää palkka tilille.
If you have a debt, you have to pay it back.
Jos sinulla on velka, sinun pitää maksaa se takaisin.

Giving Advice with "Kannattaa"

To give advice or say what someone should do, use kannattaa (to be worthwhile) with the exact same grammar rules.

You should pay the debt back quickly.
Sinun kannattaa maksaa velka takaisin nopeasti.

Obligation sentences are often combined with conjunctions like jos (if) or vaikka (even though). Note that regular clauses follow normal conjugation rules; the genitive structure only applies to the specific clause containing the obligation verb.

If you want to earn a lot of money, you should invest.
Jos haluat ansaita paljon rahaa, sinun kannattaa sijoittaa.
Even though you earn a lot, you should invest.
Vaikka ansaitset paljon, sinun kannattaa sijoittaa.

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